Clean Water Act discharge permit · NPDES MTG071466
TARGHEE PASS EAST CULVERT REPLACEMENT – CONSTRUCTION DEWATERING, West Yellowstone, MT: NPDES MTG071466 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
TARGHEE PASS EAST CULVERT REPLACEMENT – CONSTRUCTION DEWATERING, held by CK May Excavating, Inc., holds NPDES permit MTG071466, which discharges to Buttermilk Creek. EPA’s file records it issued July 24, 2026 and expiring April 30, 2030. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
What the register holds for TARGHEE PASS EAST CULVERT REPLACEMENT – CONSTRUCTION DEWATERING: its NPDES ID, its permit type and status, its dates, its address in West Yellowstone, Montana, its receiving water, and 5 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MTG071466.
Identity
| Facility as filed | TARGHEE PASS EAST CULVERT REPLACEMENT – CONSTRUCTION DEWATERING |
|---|---|
| Permittee as filed | CK May Excavating, Inc. |
| NPDES ID | MTG071466 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 24, 2026 |
| Expiration date | April 30, 2030 |
| Address | West Yellowstone, MT 59758 |
| Receiving water | BUTTERMILK CREEK |
| Subwatershed | Lower South Fork Madison River (HUC 100200070205) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 5Pollutants on file
- 5Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Turbidity | 4 | 0 | 0 | ||
| Oil & Grease | 2 | 0 | 0 | ||
| Duration | 2 | 0 | 0 | ||
| Oil and grease visual | 2 | 0 | 0 | ||
| Outfall observation,visual, y/n response | 2 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MTG071466.
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MTG071466.
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MTG071466 there.
Nearby on the register
- Discharge permits in West Yellowstone
- Every permit record in West Yellowstone, A to Z
- Discharge permits in Montana
- Every permit record in Montana, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.